. >>> also coming up, swarms of hiller hornets. this is very serious. sounds like a crazy movie but they're terrorizing people across china. >> experts say these giants are a bigger problem than ever. is that true? says here that cheerios has whole grain oats that can help remove some cholesterol, and that's heart healthy. ♪ [ dad ] jan? that's why there's new duracell quantum. only duracell quantum has a hi-density core. and that means more fuel, more power, more performance than the next leading brand. new duracell quantum. trusted everywhere. >>> with so many troops returning home with more severely wounded, a lot of people need a lot of help and that's where this week's cnn heroes steps in rallying communities to embrace the troops with what's next for a new successful life. meet michael conkland. >> the first trip to walter reed was one of my toughest trips when i saw the amount of wounded. it was shocking. >> both my legs are amputated above the knee. >> i lust my right eye. >> i have a brain injury. >> i gave up the idea of having a wife and ev